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12 May 2012

The Kestrel Conundrum

Context I used to teach kids about bluebird nestboxes at an outdoor program in Montana, and peeking into nestboxes is like opening presents. Even better, Jerod grew up with a watching the video-cam installed in a kestrel nestbox in his backyard (right in the urban core of Phoenix, AZ). As a result, the opportunity to volunteer with this project is one neither of us would have missed. It was pretty neat to get out into the countryside, meet some local (French-speaking) farmers, and poke around old barns. One gentleman was busy amassing a vast stockpile of firewood, while another family was helping a dairy cow calve. We hoped to see at least one kestrel, since they are everywhere back in MT, but we didn't. We did see a huge flock of snow geese, and some other interesting critters! For a look at all the photos from the day, click here to visit our photo gallery. For more about the project, keep reading.

At University Laval, an on-going kestrel conservation project takes Earth Day considerations to new heights. Since 2009, student members of the University Laval chapter of The Wildlife Society have been installing and monitoring nestboxes designed specifically for American Kestrels (Falco sparverius). Former Laval students, Jean-François Therrien and Jean-Rémi Julien, initiated the project as a way to launch the chapter, and to engage members with an ongoing conservation project.

American Kestrels are the smallest falcon found in North America, and their range spans much of North and South America. Their rufus backs and breasts, slate blue-gray heads and wings, and bold black bars on their heads, backs, wings and tails make them a favorite of bird watchers. Ranging from 2.8-5.9 oz in weight and 7.5-12 inches in length, males and females vary more in plumage coloration than in size. They hunt insects and small animals in open fields and meadows, and have a history as a popular falconry species.Although still considered one of the most common falcons in North America, regional and continent-wide trends indicate serious declines in kestrel populations over the past thirty years. Researchers based in Quebec and across the continent have focused efforts on identifying factors which might be driving this decline. Four reasons are widely implicated: contamination due to pesticides and other chemicals, habitat loss and degradation, increased predation by larger birds of prey, and West Nile Virus. However, according to a number of articles and peer-reviewed publications, none of these factors fully explain the scale of the population decline.

G. Kedl, checking a nestbox

Motivated by widespread concern about declining kestrel populations, kestrel nestbox projects make two key contributions to conservation efforts. Kestrels require nest cavities, such as those often found in standing dead trees. As development continues to decrease available habitat, nestboxes designed for kestrels are thought to help offset this loss. Additionally, known nest locations help researchers conduct monitoring studies, making it easier to evaluate reproductive success and even population numbers.The locally coordinated project involves an average of 85 nestboxes distributed around Quebec City, along both shores of the St. Lawrence River. This year’s project coordinator, Maël Le Corre, explained the factors involved with nestbox placement. “The boxes are placed in mature trees, on telephone and electricity poles, and on the sides of old barns. The primary considerations for nestbox placement are perpetual access to the site and proximity to both open spaces and wooded areas.”

J. Merkle, cleaning a nestbox

Several students are involved each year with various stages of the project. In March and early April, all the boxes are visited, cleaned, and repaired. “In early June,” explained Le Corre, “we check the boxes again, to see if they are occupied by a pair of kestrels. A few weeks later, we return to the boxes in which we found kestrels, to confirm whether they have laid eggs. If that is the case, we return in mid-July to band the young kestrels.” Students from undergraduate and graduate levels are recruited to assist with the all-day outings.

Undergraduate student Georges Kedl, current vice-president of the University Laval TWS chapter, said he participates because, “I think it is important to get out and be a part of something tangible. And, it is really important for students, our members, to experience interacting with the public, which is a key part of this project.” Le Corre added, “I am a PhD student working on caribou. Not being a birder, I found it really interesting and rewarding to take care of something related to birds.” Le Corre noted that last year, four nests were occupied, and one pair successfully fledged young kestrels. He said, “It may sound small, but for this kind of project, it is a very encouraging start. I think the occupation of nests often takes a few years.” At this point, monitoring 85 boxes requires a lot of investment by the chapter. It also involves a partnership with local residents. He elaborated, “The majority of nests are placed on private property, where homeowners can monitor the houses regularly, too. If nesting success increases, it is possible we will expand the network of bird houses. Although you might, sometimes, find kestrels in urban areas, it is more likely to find them on the outskirts of a city.”For more information about kestrels and related conservation efforts, visit kestrel.peregrinefund.org. An extra bonus, the site features a webcam enabling viewers to observe a pair of kestrels raising their young inside a nestbox. Throughout North America, citizens are contributing to this effort by building and installing nest boxes - for kestrels and other cavity-nesting birds. This website also provides details on constructing and placing your own kestrel nestbox and how to join citizen monitoring projects.

Anne,We miss you guys, too! I don't know if we're going to make it there in Sept. That's when work starts to pick up again for both of us, and my sister is coming to visit (here in QC) the 1st week of Sept. I WISH we could be there for the Grand Opening, though!As always, we will let you know if we are headed to Missoula. And, if you ever make it out to the east coast, we would LOVE to be your base camp for a tour of French Canada! :)